Syntax Highlighting messes up with generic optional parameters

[kfish610]

Taking an example from the documentation, this snippet:

let drawCircle: (~color: color, ~radius: int=?, unit) => unit =
  (~color: color, ~radius: option<int>=?, ()) => {
    setColor(color)
    switch radius {
    | None => startAt(1, 1)
    | Some(r_) => startAt(r_, r_)
    }
  }

highlights >= as an operator, rather than as a closing bracket for the generic and an equal sign. This happens in VS Code as well:

This is particularly problematic for those who use ligature fonts, as ligatures depend on proper coloring to break up things that look like ligatures but really aren't.
Is the tokenizer/grammar that colors this defined here, or in another repository?

[chenglou]

Thanks. This is half our bug and half VSCode's bug I believe. I've just fixed our side of the problem (and confirmed it through Sublime Text properly un-ligaturizing the >= part).
The other part is submitted to VSCode as microsoft/vscode#111945

[jmagaram]

I'm running into this problem too. Optional parameters look like either >= or another weird symbol - see image.